﻿//
// Copyright (c) 2011 Canyala Innovation AB
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and 
// associated documentation files (the "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 
// copies of the Software, and to permit persons to whom the Software is furnished to do so, 
// subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT 
// NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, 
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH 
// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Canyala.Lagoon.Expressions
{
    public class Symbols 
    {
        private Dictionary<string, double> dictionary = null;

        public Symbols()
        {
            dictionary = new Dictionary<string, double>();
        }

        public Symbols(string name, double value) : this()
        {
            Assign(name, value);
        }

        public double this[string name]
        {
            get { return ValueOf(name); }
            set { Assign(name, value); }
        }

        public double ValueOf(string name)
        {
            double value;
            if (dictionary.TryGetValue(name, out value))
                return value;
            return 0.0;
        }

        public void Assign(string name, double value)
        {
            dictionary[name] = value;
        }
    }
}
